You live in a dimensionless apartment building of the Khrushchev-Brezhnev period. You were born in Gigahrushchevka, you work in Gigahrushchevka, you will die in Gigahrushchevka without seeing the world on the other side of the walls. Although no one knows if there is anything outside but the walls of the block next door. It is not known when and who built this house, and attempts to fully explore it can be stopped by an anomalous phenomenon. Known as SAMOSBOR.